update babel-runtime dependency in react-error-overlay and react-scripts (facebook#2991)

* update babel-runtime dependency in react-error-overlay and react-scripts

`babel-runtime@6.23.0` have a dependency on `regenerator-runtime@0.10.5`
`babel-runtime@6.26.0` on `regenerator-runtime@0.11.0`

> npm ls regenerator-runtime

```
└─┬ react-scripts@1.0.11
  ├─┬ babel-core@6.25.0
  │ └─┬ babel-runtime@6.26.0
  │   └── regenerator-runtime@0.11.0
  ├─┬ babel-eslint@7.2.3
  │ └─┬ babel-traverse@6.26.0
  │   └─┬ babel-runtime@6.26.0
  │     └── regenerator-runtime@0.11.0
  ├─┬ babel-runtime@6.23.0
  │ └── regenerator-runtime@0.10.5
  └─┬ react-error-overlay@1.0.10
    └─┬ babel-runtime@6.23.0
      └── regenerator-runtime@0.10.5
```

* fix requested changes

Author: christophehurpeau

packages/react-error-overlay/package.json

@@ -33,7 +33,7 @@
   "dependencies": {
     "anser": "1.4.1",
     "babel-code-frame": "6.22.0",
-    "babel-runtime": "6.23.0",
+    "babel-runtime": "6.26.0",
     "html-entities": "1.2.1",
     "react": "^15.5.4",
     "react-dom": "^15.5.4",

packages/react-scripts/package.json

@@ -27,7 +27,7 @@
     "babel-jest": "20.0.3",
     "babel-loader": "7.1.1",
     "babel-preset-react-app": "^3.0.2",
-    "babel-runtime": "6.23.0",
+    "babel-runtime": "6.26.0",
     "case-sensitive-paths-webpack-plugin": "2.1.1",
     "chalk": "1.1.3",
     "css-loader": "0.28.4",